Machine for assembling sifter top packages



L. GALOCKIN E AL MACHINE FOR ASSEMBLING SIFTER TOP PACKAGES Nov. 10,1970 Filed July 5, 1968 4 Sheets$heet l NOV. 10, 1970 GALQCKIN ETAL3,538,583

MACHINE FOR ASSEMBLING SIFTER TOP PACKAGES Filed July 5, 1968 4 Sheets$heet 5 '32 .542 /29 2Q .nlul -62 I lllllll 56 l zgqegzezi fi /@2111?!Nov. 10, 1970 GALOGKIN ETAL 3,538,583 I MACHINE FOR ASSEMBLING SIFTERTOP PACKAGES Filed July 5, 1968 4 Sheets-Sheet 4- :QTTOENEPS UnitedStates Patent US. Cl. 29-208 17 Claims ABSTRACT OF THE DISCLOSURE Amachine for assembling a partially completer sifter container or dredgerfor granular material prior to the filling thereof. The particular typeof dredger comprises an elongate tubular body having a return-bentinterior flange at one end thereof, an apertured cover member fixedlysecured within said body element and a perforated sifter top rotatablyengaged within said tubular body between the cover member and saidinterior flange, and an opposite open end for filling the partiallycompleted container. The machine employs a plurality of work stationswhich perform the following assembly steps: curling of the open end ofthe body element inwardly to provide the interior flange; insertion ofthe sifter top within the body element in engagement with said flange;and insertion of the apertured cover member in frictional en gagementwith the interior walls of said body element to rotatably mount saidsifter top between the flange and said cover member. These steps areperformed with the sifter top and cover member each oriented in apredetermined position such that upon assembly the aperture in the covermember overlies or is in registry with an imperforated portion of thesifter top whereby subsequent filling of said dredger may be performedWithout the danger of granular material being discharged inadvertentlythrough openings in the superposed sifter top and cover member. Themachine is constructed to permit its stations to operate concurrently sothat a tubular body is delivered to the first station, and other tubularbodies are in some stage of partial assembly and in completed partialassembly and being withdrawn from the machine during each cycle ofoperation of the machine.

BACKGROUND OF THE INVENTION The invention relates to automatic apparatusfor assembling dredger or sifter-type dispensing containers for granularmaterial or the like and more particularly, to an improved machine forassembling a plurality of partially completed containers sequentiallywhich subsequently may be filled and sealed by the users of saidcontainers.

The sifter-type containers with which the machine embodying theinvention is operable generally includes an elongate tubular bodyelement having a sealed bottom and an apertured upper cover member witha sifter top rotatably affixed in superposed relationship to said cover.The tubular body has a return bent interior flange contiguous the upperend of the body which functions in conjunction with the apertured covermember to rotatably mount the sifter top.

The normal practice in the art is for the manufacturer of the sifter topcontainers to supply these to the producer or filler of the granularmaterial in a partially completed condition, i.e., without the bottomclosure member in place. Thus, this bottom end is open in the partiallyassembled condition of the container. The filler inverts the containersfor filling through the open bottom end and then seals each container byaflixing the bottom closure member thereto. Thus, it is absolutelyessential that misalignment of the apertures or openings in the siftertop and the cover member be maintained during the filling operation;otherwise, the granular material will be discharged inadvertently,during filling from the container. In order to ensure the properalignment of the sifter top and cover members, it was the prior artpractice to assemble these dredges or sifter containers individually inmanual steps. This manual method of assembly greatly increased the costof production with attendant problems of manual opeartions and personnelproblems.

SUMMARY OF THE INVENTION The present invention solves the problemsalluded to above by providing a machine which will automaticallyassemble a partially completed dredger in preparation for the fillingoperation, while ensuring the proper alignment or orientation of thesifter top and cover member to preclude seepage of the granular materialduring filling. The machine utilizes a plurality of work stations, atleast two of which are employed to insert the perforated sifter top andapertured cover member. The sifter top inserting station employs meanswhich orient the per- =forated portions of each sifter top such thatupon insertion they are disposed in a predetermined spatial relationshipwith respect to the body element of the partially completed dredger. Thecover member inserting station, which receives the dredgers from thesifter top inserting station, also employs means which disposes thecover members Within the body elements with the apertures in apredetermined position, whereby said apertures Will overlie imperforatedportions of the previously oriented sifter tops and the several openingsin these parts will be out of registry so that granular materials cannotbe discharged inadvertently.

DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a completedsifter top container with a dust cover afiixed to the upper end thereof.

FIG. 2 is an exploded perspective view of a partially completedcontainer illustrated in an inverted position preparatory for filling.

FIGS. 3a to 3e are sectional views illustrating the progressive stepsperformed by the machine embodying the invention in the mass-productionof the partially completed container of FIG. 2.

FIG. 4 is a schematic top plan view of a machine embodying theinvention.

FIG. 5 is a sectional view taken along the line 55 of FIG. 4.

FIG. 6 is a schematic representation, partially in section, of thecurling station of the machine of FIG. 4, illustrating how the interiorreturn-bent flange is formed on the upper end of the tubular body.

FIG. 7 is a schematic representation of the sifter top insertion stationillustrating the manner in which the sifter top is engaged by a plungerand positioned within the tubular body.

FIG. 8 is a schematic representation of the cover member insertingstation illustrating how a cover member is sequentially punched andfrictionally engaged Within the tubular body.

FIG. 9 is a schematic representation of the dust cover insertingstation.

FIG. 10 is a perspective view of an actual machine embodying theinvention illustrated schematically in FIGS. 4 through 9.

FIG. 11 is a perspective view of the rear of the machine illustrated inFIG. 10, and more clearly illustrating the gravity feed arrangements forthe sifter top, cover member, and dust cover inserting stations.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIGS. 1 and 2,there is illustrated, respectively, a completed and a partiallycompleted sifter top container with which the invention is concerned.For the purposes of convenience and clarity, the container illustratedhere, irrespective of degree of completeness, will be designatedgenerally 20.

The particular type of container 20 is comprised essentially of anelongate tubular body element 22, an upper cover member 24 having anaperture 25 formed therein, a sifter top 26 provided with dispensingperforations 27 and a pair of finger grips or protuberances 29 tofacilitate turning thereof, an optional dust cover 28, and the lower orbottom closure 30. The closure member 30 is shown in FIG. 1, but isomitted from FIG. 2 since the latter is illustrative of the containerformation as supplied to a filler with the closure member being suppliedseparately for subsequent assembly to the body 22 after filling.

While the machine embodying the invention is designed primarily toprovide a partially completed container for subsequent filling, it mustbe understood that the invention is not limited thereto. It iscontemplated that the machine of the invention may be modified to add afilling station and a sealing station for afiixing the lower closuremember 30 to the body element 22 either as a part thereof or is set uptherewith as part of a line.

The sequential steps for forming the partially completed dredger of FIG.2 are illustrated in FIGS. 3a through 32. First, the uncurled tubularbody 22 is subjected to a curling operation which return-bends an endthereof inwardly to define an interior curl or reversebent flange 32illustrated in FIG. 3b. Next, the sifter top 26 is inserted into thecurled body 22 in engagement with the flange 32, and thereafter, theapertured cardboard or plastic or metal disk or upper cover member 24 isinserted into the body 22 in position overlying and engaged upon thesifter top 26 as shown in FIGS. 30 and 3d. The engagement of the uppercover member 24 within the body 22 is of a frictional nature such thatthe sifter top 26 is rotatably mounted between the flange 32 and saidcover member 24. The last step of the assembly is illustrated in FIG.3e, and involves atfixing the dust cover 28 within the Well or spacedefined by the reverse-bent flange 32 and the sifter top 26. The dustcover 28, as well as the specific construction thereof, are optionalfeatures and may vary depending upon the spe cific requirements anddesires of the filler.

Attention is directed to the circumstance that in the partiallycompleted dredger 20 of FIG. 32, aperture 25 in cover member 24 is inregistry with or overlies on 4 imperforated portion of the sifter top26. If this relationship is not achieved and the respective openings 25and 27 are aligned or in registry to any degree, upon filling, thegranular material will escape and fill the dust cover 28.

Turning now to FIGS. 4 through 11, there is illustrated the automaticmachine of the invention which will perform the sequential assemblysteps illustrated in FIGS. 3a to 3e While ensuring the properorientation of both the sifter top 26 and the cover member 24 so as toobviate any problems of leakage during the aforementioned fillingoperation.

FIG. 4 is a schematic representation of the machine of the invention,which will be designated generally 40. Machine 40 employs a plurality ofwork stations, the general construction and operation of which areillustrated in and will be described in connection with FIGS. 6 through9. Machine 40 is provided with a turret and conveyor or transportarrangement 42, said turret having a plurality of stations or recesses43 formed therein designed to receive and hold a body element 22 invarious stages of assembly. 'In operation of the machine, there isemployed a conventional drive arrangement (not shown) which uses aGeneva gear system driven from fractional horse-power motors throughlinkages for indexing movement of the turret 42. With this particulardrive arrangement and gear system, the Work at the various stations willbe performed simultaneously, each indexing of the turret 42 discharginga completed item.

To supply the uncurled body elements 22 to the machine an infeedconveyor 44 and a pusher 46 are used. Accordingly, as the turret 42indexes, pusher 46 will dispose an uncurled body element 22 in uprightposition in one of the recesses 43 in said turret 42. It should be notedthat the uncurled body element 22 is supplied to machine 40 in aninverted position, as illustrated in FIG. 2.

Continued indexing of the turret 42 will dispose the uncurled bodyelement 22 approximate the curling station, which is designatedgenerally as 50. At curling station 50, the upper edge of the bodyelement 22 which is facing downwardly due to the inverted position ofsaid element 22, is curled inwardly to form the reverse-bent flange orbead 32 shown in FIG. 3b.

The general construction of curling station 50 is illustratedschematically in FIG. 6 and includes, a reciprocal curling die 52 havingan annular forming groove 54 and a heating coil 56. When the uncurledbody element 22 is positioned approximate the curling station 50, oneedge thereof will align with the groove 54, while the other edge ispositioned to be engaged by plunger 57. Accordingly, the plunger 57 willengage the body element 22 forcing same downwardly, while the die 52 ismoved upwardly by way of the pusher 58 to engage the body element. Thisjoint movement of the plunger 57 and the die 52 exerts proper pressureon the body element 22 in conjunction with the heating effect achievedby coil 56 so as to curl the end thereof inwardly to form the flange orbead 32.

After flange 32 is formed, both the plunger 57 and the curling die 52retract to permit the curled body element 22 to be indexed to the nextwork station, which is the sifter top inserting station. The sifter topinserting station is designated generally 60 in FIG. 4, and the generalconstruction thereof is illustrated in FIG. 7.

At the sifter top inserting station 60, a sifter top 26 is disposedwithin the curled body element 22 in engagement with flange 3-2 by apiston 62, as shown in FIG. 30. Associated with the piston 62 is avacuum line 63 which is connected to a source of vacuum (not shown) sothat as the sifter top is positioned beneath said piston 62, the vacuumpressure will hold said top 26 in engagement with the piston 62, thuspermitting proper seating of said top on the flange 32, as illustratedin phantom in FIG. 7.

The apparatus for supplying the sifter tops 26 to the inserting station60 is illustrated schematically in FIG. 4 and can be viewed more readilyin FIGS. 10 and 11. As

was discussed previously, not only must the sifter top 26 be properlyseated within the body element 22, but it must be inserted such that theperforated portions 27 are in a articular orientation with respect tosaid body element 22. To achieve such proper orientation, the siftertops 26 are supplied to station 60 by way of a chute 64 which isassociated with a part feeding device (not shown) of the type designedto supply parts in the particular orientation. Parts feeders of the typementioned are known in the art, and those such as produced by theSyntron Company of Homer City, Pa. are well suited for use with thepresent invention, it thus being deemed unnecessary to elaborate on theparticular construction thereof.

Chute 64, as illustrated in FIG. 5, is comprised of an upper guidemember 65 and a lower guide track 66. The lower guide track 66 isprovided with an elongate channel 67 in which the protuberances 29 ofthe sifter tops 26 are disposed. Thus, as the sifter tops 26 move underthe influence of gravity down the chute 64 along track 66, theorientation of the perforated portion 27 of each top will be the sameand preferably that as illustrated in FIG. 4.

Positioned at the lowermost point of chute 64 is a reciprocal pusher 68.The pusher 68 is operated to index an individual sifter top 26 intoposition for engagement by the piston 62 which will then dispose saidtop within the body element as described above. With the particularapparatus illustrated and described, the perforated portions 27 of thesifter tops 26 will always be disposed in the same relationship withrespect to body element 22, i.e., they will lie along the line 69-69.

Once the sifter top 26 is properly inserted within the body elements 22,the turret 42 will index thereby transferring the dredger to the covermember inserting station which is designated generally 70. Theparticular turret arrangement illustrated is an eight position unit, andaccordingly, with the respective stations positioned in the mannerillustrated it will take two indexing movements of the turret before thedredger 20 reaches the cover member inserting station 70. Also, itshould be noted that as the turret indexes and transfers the dredger 20from station to station, the position of a body element with respect tothe turret 42 does not change so that the line 69-69 which representsthe orientation of the perforations 27 will always form the same angle awith a radial line 71-71.

The cover member inserting station 70, which is illustrated in detail inFIG. 8 employs inserting means similar to that used by the sifter topinserting station 60 in that a piston 72 having a vacuum line 73 isemployed to dispose the cover members within the body elements 22. Inactual practice, the respective pistons 62 and 72 are ganged and thevacuum lines 63 and 73 are connected to the same source of vacuum. Thevacuum line 73 maintains the cover members 24 in engagement with thepiston 72 during insertion, which is extremely important since the covermember 24 is slightly oversized so that it may be frictionally engagedwith the inner walls of the body 22 to wedge same in place overlying thesifter top member 26.

As was discussed previously, it is essential that the cover members 24be inserted with their aperatures 25 in a predetremined position,namely, having their centers on a diametrical line disposedsubstantially at 90 degrees with respect to the line 6969. If such isthe case, then proper orientation is ensured and the aperatures 25 willoverlie imperforated portions of the sifter tops 26.

To ensure the proper orientation of the cover member 24 when same issupplied to the piston 72, there is associated with the piston 72 apunch or a cutter 74 which forms the aperatures 25 in the cover member.The blank or imperforate cover mombers 24 are fed to the cutter 74 froma hopper 76 by means of a pusher 78 which is also used to force thepunched or apertured cover member 24 into position for engagement by thepiston 72. While this feed arrangement is illustrated schematically inFIG.

4 it actual construction in a working embodiment of the invention can beseen in FIG. 11.

Accordingly, by use of the punch or cutter 74 to form aperture 25immediately prior to disposition thereof within the body element 22, itis ensured that the aperture 25 of each cover member supplied to piston72 will be in the same position or orientation. Taking into account thepreviously discussed orientation of the perforation 27 along the line6969, by selecting the location for the punching of the apertures 25 itcan be assured that said apertures will be properly aligned upon finalassembly of the cover member 24 within the body element 22.

After the sifter top 26 and the cover member 24 have been assembledwithin body element 22, dredger 20 is then ready for filling and may bedischarged from the machine. With the embodiment shown in the drawings,however, there is provided a further work station for the aflixing ofthe dust cover 28, said cover aflixing station being designatedgenerally 80.

The dust covers 28 are supplied to the affixing station 80 by means of agravity chute 82 in much the same manner as previously discussed withregard to the sifter tops 26. However, unlike the sifter tops 26, thereis no need for the dust covers to be supplied in any specificorientation. Dust covers 28 are supplied individually to a pointimmediately below the dredger 20, as same arrives at the afiixingstation 80. This is achieved by means of a separator mechanism 84 whichis coupled to the overall gearing system of the machine. The separatormechanism 84 utilizes a spring-biased arm 85 and a pusher 86 which areganged for alternate operation. Thus, as the arm 85 is retracted topermit one of the dust covers 28 to move doWn the chute 82, the pusher78 is advanced to engage the said dust cover and move same into aposition immediately below the dredger 20. The movement of the dustcovers 28 along chute 82 may be facilitated by the use of an airjetsupplied by the conduit 87.

Referring now to FIG. 9, the means for afiixing the dust covers 28 tothe dredger 20 is illustrated. At the dust cover aflixing station 80,there is provided a piston or plunger 88 having an upper planar surface89 which receives the dust covers 28 from the pusher 86. Once receivedin the position illustrated and with the dredger 20 positionedapproximate affixing station 80, the dust cover 28 will align with thewell defined by interior flange 32 and the sifter top 24 of said dredgerwhereby upon operation of the piston 88 said cover may be fixed thereto.

Upon indexing of the turret 42 after the dust cover 28 has been afiixed,dredger 20 will be engaged by a spring arm 90 which is eifective toremove the partially completed dredger from the recess 43 in turret 42.As the dredgers 20 are removed from the turret 42, they will be receivedby a discharge conveyor 92 for trans portaiton from the machine 40.

In FIGS. 10 and 11, which have been alluded to previously in conjunctionwith the description of the schematic illustrations of FIGS. 4 and 9,there is shown an actual embodiment of a present invention with thevarious elements thereof bearing the same reference character as thecorresponding parts of the previously discussed schematicrepresentation. The machine or embodiment of FIGS. 10 and 11 is designedto perform the sequence of operations illustrated in FIGS. 3a through32. In addition, the apparatus at the various stations is adjustable sothat dredges of various sizes may be accommodated. In addition, themachine 40 employs an eight position arrangement, with room foradditional stations, it being intended that said machine may be adaptedfor other operations such as the filling and sealing of said dredgers.

While the invention has been described in conjunction with theaccompanying drawings, it is envisioned that means equivalent to thosedescribed and illustrated may be employed to perform the sequentialsteps described above Without departing from the spirit and scope of theinvention. In addition, it is also envisioned that one or more of thediscussed stations or operations may be omitted, for example, the bodyelements may be precurled prior to being supplied to said machine, thuseliminating the need for the curling station; or the dust cover affixingstation may be omitted depending entirely upon the users requirements.

What it is desired to be secured by Letters Patent of the United Statesis:

1. A machine for automatically and sequentially assembling a pluralityof like dispensing containers into a partially complete condition forthereafter being filled with granular material or the like, eachcontainer comprising an elongate tubular body having a return-bentinterior flange at one end thereof, an apertured cover member securedwithin said body portion, and a perforated sifter top rotatively engaged'within said body element between the cover member and said interiorflange, and an opposite open end, said machine comprising: a curlingstation means for providing the interior flange on the said one end of atubular body; a sifter top station including means for inserting thesifter top within a said tubular body in engagement with said interiorflange, said sifter top station means including orienting means forpositively positioning said sifter top with its perforations in apredetermined spatial relationship relative to the tubular body; and acover inserting section including means for engaging an apertured covermember with in a tubular body in superposed relationship with respect tosaid sifter top and with the aperture therein in registry with animperforate portion of said sifter top, whereby a partially completedcontainer may be filled through said open end without the granularmaterial being discharged through any of the openings in the superposedsifter top and cover member respectively of a container while beingfilled.

2. A machine as defined in claim 1 and further including a dust coverstation having means for afiixing a dust cover to overlie said one endof a tubular body with its assembled cover member and sifter top.

3. A machine as defined in claim 1 wherein said sifter top insertingmeans includes a piston which engages and seats said sifter top withinthe tubular body in engagement with said interior flange.

4. A machine as defined in claim 3 wherein said piston includes vacuummeans for maintaining the engagement between the piston and the siftertop during the inserting step.

5. A machine as defined in claim 1 wherein said orienting means includesa track over which said sifter tops travel, said track having anelongate groove extending along its length for receiving protuberancesformed on said sifter tops at preselected locations, whereby topositively position the perforated portions of each sifter top similarlyoriented with respect to each tubular body in which the same is insertedby said sifter top inserting means.

6. A machine as defined in claim 1 wherein said cover inserting meansincludes a piston operable to force the cover member into the tubularbody with the marginal edges of the apertured cover member in frictionalcontact with the interior walls of the tubular body.

7. A machine as defined in claim 6 wherein said piston includes vacuummeans to maintain engagement between the piston and the cover memberduring disposition of said cover member in said tubular body.

8. A machine as defined in claim 1 and in combination, further includingcutter appaartus associated with said apertured cover member insertingmeans, said cutter apparatus operable to form the aperture in said covermember immediately prior to insertion thereof into said tubular body andat a predetermined location whereby said cover member will be sopositioned with respect to the 8 previously oriented sifter top thatsaid aperture therein overlies an imperforate portion of said siftertop.

9. A machine as defined in claim 1 wherein said curling station meansincludes a die having an annular forming groove, and a plunger forforcing said one end of the tubular body into said groove to curl saidend inwardly thereby defining said interior flange.

10. A machine as defined in claim 9 and including a heating meansassociated with said die to facilitate the curling operation.

11. A machine as define in claim 1 including conveyor means fordelivering tubular bodies to the stations of the machine and forremoving the partially completed containers.

12. A machine as defined in claim 1 in which each station is operatedconcurrently in a mass-production type operation.

13. A machine as defined in claim 1 in which said sifter top insertingmeans and aperture cover inserting means are ganged for concurrentoperation.

14. A machine for automatically assembling a partiall completed dredgerfor granular material or the like, said dredger including an elongatetubular body element having an interior flange on one end thereof, acover member having an aperture formed therein and being frictionallydisposed within said body element, and a perforate sifter top disposedin engagement with said flange and interposed between said aperturedcover member and said flange, whereby said sifter top may be rotated toalign the perforated portions thereof with said aperture to permitdispensing of the granular material, said machine comprising: means forinserting a sifter top within a body element having an interior flangeformed on one end thereof, said means including apparatus to align andorient said sifter top such that the perforated portions thereof are ina predetermined position with respect to said body element uponinsertion of said sifter top therein, and additional inserting means fordisposing the aperture cover member within the body element and inengagement with the sifter top, said additional inserting meansorienting the apertured cover member with respect to the body portionsuch that the aperture formed therein overlies an imperforated portionof said sifter top, whereby said dredger may be filled subsequentlywithout danger of the granular material escaping through alignedopenings in the superposed sifter top and cover member.

15. A machine for automatically assembling a partially completed dredgerfor granular material or the like, said dredger including an elongatetubular body element having an interior flange on one end thereof, acover member having an aperture formed therein and being frictionallydisposed within said body element, and a perforate sifter top disposedin engagement with said flange and interposed between said aperturedcover member and said flange, whereby said sifter top may be rotated toalign the perforated portions thereof with said aperture to permitdispensing of the granular material, said machine comprising: means forproviding an interior flange on one end of the body member, means forinserting the perforated sifter top within said body member inengagement with said interior flange such that the perforated portionsthereof are oriented in a predetermined relationship with respect to thebody element, and means for inserting the apertured cover memberfrictionally within the body portion in engagement with the sifter topand in a predetermined orientation with respect to said body element,such that said aperture formed therein overlies an imperforated portionof the sifter top.

16. The machine as defined in claim 15 further including conveyorapparatus for transmitting the partially assembled container from one ofsaid means to the other.

17. A machine for partially assembling a dredger prior to the fillingthereof with a granular material, said dredger comprising an elongatetubular body element having a reverse-bent interior flange formed on oneend thereof,

a cover member frictionally disposed in said body element and having adispensing aperture formed therein, and a perforated, relativelyrotatable sifter top disposed between said flange and said aperturedcover member, said machine comprising: a curling station including a diefor forming the reverse-bent flange on one end of the embodied element,a sifter top inserting station including means for disposing a sittertop Within the body element in engagement with the reverse-bent flange,said means including apparatus for orienting said top such that theperforated portions thereof are disposed in a predetermined relationshipwith respect to the body element, a cover member inserting stationincluding means for frictionally engaging a cover member Within the bodyelement in a contiguous predetermined relationship with respect to saidsifter top such that the apertures formed in said cover member overliesan imperforated portion of the sifter top, and a dust cover afiixingstation including means for assembling a dust cover on said embodiedelement to overlie and block said one end thereof, and a conveyor meansfor transporting the partially completed dredgers from one station tothe other, said conveyor means including infeed and discharge apparatus.

References Cited UNITED STATES PATENTS 3,374,605 3/1968 Satchwell et al.

THOMAS H. EAGER, Primary Examiner US. Cl. X.R. 29-211 zg ggg UNITEDSTATES PATENT OFFICE CERTIFICATE OF CORRECTION 3,538,583,- DatedNovember 10, 1970 Patent No Invencofls), Lohgfn Galo'ekifi, 'w alterfiu-G1azewski',.Eugene R-. S'itkowki it 1s -c'er ti'f 1ed 113: error appearsin the above ident'ifled' petent and that said Le tter ze Pateht arehereby-oon-ectedas shown below:

Colfiinn 1., line 14,. before "si'fter change -"comp1eter" to----.c'omp1ete' d- Column 5,' line 49, before."within-" change "25'? to"24; Column 5, line 71, after ".cpver'Ychange "members"; to-'--members---; Colunm 6,1'11ne 1, before "Factual." change "it"fto--its- Column 6, lines 54 and 55, after T'for" ohan'ge ;'-'tran sporta1ton7" e 'to.---i:tr:an53- 50rtation' Co1umn'7, claim 1,v1in e'"28,,after. "'i nelerti'pg'j c h agg e "sectiori'" to s1: at1on I I.

Column 7, cleim 8Q'11ne70, after "cutter" change "appa artus"' toColumn-8', claim 11, line .11 after '-.'as" change "define" to 9, line16, delete- "s" after "apertures".

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